Day 2

src/day02.scala

@@ -0,0 +1,58 @@
+package aoc
+package day02
+
+val dayNumber = "02"
+
+@main def part1: Unit =
+  println(part1(loadInput(dayNumber)))
+
+@main def part2: Unit =
+  println(part2(loadInput(dayNumber)))
+
+def part1(input: String): String =
+  val bagContent = Map(
+    "red" -> 12,
+    "green" -> 13,
+    "blue" -> 14
+  )
+
+  input
+    .split("\n")
+    .map(line =>
+      (
+        line match
+          case s"Game $number:$rest" => number.toInt
+        ,
+        """(\d+ \w+)""".r
+          .findAllIn(line)
+          .toList
+          .map { case s"$count $color" =>
+            (count.toInt, color)
+          }
+      )
+    )
+    .collect {
+      case (gameNumber, sets)
+          if sets.forall((count, color) => bagContent(color) >= count) =>
+        gameNumber
+    }
+    .sum
+    .toString
+
+def part2(input: String): String =
+  input
+    .split("\n")
+    .map(line =>
+      """(\d+ \w+)""".r
+        .findAllIn(line)
+        .toList
+        .map { case s"$count $color" =>
+          (count.toInt, color)
+        }
+    )
+    .map(_.foldLeft(Map().withDefaultValue(0)) { case (acc, (count, color)) =>
+      acc.updated(color, Math.max(acc(color), count))
+    })
+    .map(_.values.product)
+    .sum
+    .toString